Just cycle the car on and off and see if it resets. Sometimes the suspension inactive light comes on if there is a power surge in the electrical of the vehicle.

If it clears on its own you shouldn't worry too much.

In my case, I had it happen a few times. Diagnosed it to the following:

1) First time light came on, traced it to faulty Bluetooth module. I pulled it out and didn't have the error happen again. As soon as I inserted it, it would error

2) Light came on, diagnosed it to a fault related to my second stage resistor for the blower fan. Cleared the fault and swapped the resistor. Cleared the problem

What is funny is that the light never came on when my suspension airbag had a leak. I would find the car tilted to one side in the morning. Ended up diagnosing it to a known issue of the Suspension bladder having a pinhole leak in it.

The light never came on and the car would drive extremely poorly from being lopsided till i activated the suspension to refill with air. (I have Full Air suspension on my 03)